A non-methane hydrocarbon detection device

Abstract

The application discloses a non-methane total hydrocarbon detection device, which comprises a first mounting chamber, a gas chromatograph arranged in the first mounting chamber, the gas chromatograph being used for qualitative and quantitative analysis of a multi-component mixture; a second mounting chamber, a hydrogen-air integrated machine arranged in the second mounting chamber, the hydrogen-air integrated machine being connected with the gas chromatograph through a pipeline and providing hydrogen and air for a detector in the gas chromatograph; and a third mounting chamber, a pretreatment system arranged in the third mounting chamber, the pretreatment system being connected with the gas chromatograph through a pipeline and providing driving gas and a positive pressure gas source for the gas chromatograph. The scheme of the application effectively improves the integration degree by integrating the gas chromatograph, the hydrogen-air integrated machine and the pretreatment system in independent mounting chambers in the detection device. In addition, the gas chromatograph is arranged in an independent box body, and thus it is not necessary to externally arrange an explosion-proof house, and the explosion-proof requirement of an explosive place such as a petrochemical plant can be directly met.

Description

Technical Field

[0001] This application generally relates to the field of detection device technology. More specifically, this application relates to a non-methane total hydrocarbon detection device. Background Technology

[0002] In industrial production processes, petrochemical, steel, and coal industries generate large amounts of waste gas. Non-methane hydrocarbons (NMHC), a significant component of air pollutants, require accurate monitoring for effective air pollution control, environmental protection, and production safety. However, traditional NMHC monitoring devices suffer from low integration and insufficient explosion-proof performance. Specifically, the independent operation of individual components lacks synergistic optimization. For instance, the gas supply method between the integrated hydrogen-air analyzer and the gas chromatograph is simplistic, and the loose connection between the pretreatment system and the gas chromatograph hinders efficient sample processing and transfer. Furthermore, in industrial environments containing explosive hazardous materials, ordinary NMHC monitoring devices often fail to meet explosion-proof requirements.

[0003] In view of this, there is an urgent need to provide a solution for non-methane total hydrocarbon detection device in order to improve integration and explosion-proof performance. Utility Model Content

[0004] In order to at least solve one or more of the technical problems mentioned above, this application proposes a highly integrated non-methane total hydrocarbon detection device with explosion-proof performance.

[0005] This application provides a non-methane total hydrocarbon detection device, comprising: a first installation chamber housing a gas chromatograph for qualitative and quantitative analysis of multi-component mixtures; a second installation chamber housing a hydrogen-air integrated unit connected to the gas chromatograph via a connecting pipe, providing hydrogen and air to the detector in the gas chromatograph; and a third installation chamber housing a pretreatment system connected to the gas chromatograph via a connecting pipe, providing driving gas and a positive pressure gas source to the gas chromatograph.

[0006] In some embodiments, the first installation chamber includes, from top to bottom, the following: an electrical chamber housing a power supply module, a signal conditioning module, and a control module; a gas path chamber for centralizing various pipelines; and an electronic pressure and flow control chamber and a temperature control chamber, arranged side-by-side below the gas path chamber, wherein the electronic pressure and flow control chamber houses an electronic pressure and flow control module and a solenoid valve; and the temperature control chamber houses a heating module, a sample introduction device, a filter, and a flame ionization (FID) detection module.

[0007] In some embodiments, the electrical room is further equipped with an explosion-proof positive pressure control system and a data acquisition and analysis module.

[0008] In some embodiments, the door cover of the electrical compartment is equipped with a touch display terminal, and the door cover of the pneumatic compartment is equipped with a pressure regulating valve and a pressure gauge.

[0009] In some embodiments, the temperature control chamber is further provided with a multi-way valve, a chromatographic column, and a quantitative loop.

[0010] In some embodiments, the hydrogen-air integrated unit includes a hydrogen / air generating unit that is connected to a detector via a pipeline and supplies it with hydrogen and air.

[0011] In some embodiments, the enclosure surrounding the second installation chamber is an explosion-proof enclosure that meets explosion-proof rating certification.

[0012] In some embodiments, the pretreatment system includes a filter, a pressure regulating valve, a pressure gauge, a flow meter, and a jet pump.

[0013] In some embodiments, the compressed air inlet of the pretreatment system is divided into five paths via a filter, wherein the first and second paths are connected to a jet pump via a pressure regulating valve to form a sampling air path; the third path is connected to a flow meter to form a purging air path; the fourth path is connected to a pressure regulating valve to form a driving air path; and the fifth path forms a positive pressure air source air path.

[0014] In some embodiments, the bottom of the housing that forms the first installation chamber, the housing that forms the second installation chamber, and the housing that forms the third installation chamber are all provided with transport gaps, and the side walls of the housing are all provided with mounting ears.

[0015] The non-methane total hydrocarbon detection device provided above effectively improves integration by integrating the gas chromatograph, hydrogen-air integrated unit, and pretreatment system into separate installation chambers within the detection device. Furthermore, the hydrogen-air integrated unit is installed in a second installation chamber, replacing the traditional external gas cylinder source and avoiding the risks associated with leaks from external hydrogen or air pipelines. The gas chromatograph is housed in an independent enclosure, eliminating the need for an external explosion-proof enclosure and directly meeting the explosion-proof requirements of explosive environments such as petrochemical plants. Attached Figure Description

[0016] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0017] Figure 1 A structural block diagram of a non-methane total hydrocarbon detection device according to an embodiment of this application is shown;

[0018] Figure 2 A structural block diagram of a gas chromatograph according to an embodiment of this application is shown;

[0019] Figure 3 A front view of the non-methane total hydrocarbon detection device according to an embodiment of this application is shown;

[0020] Figure 4 An internal structural diagram of the non-methane total hydrocarbon detection device according to an embodiment of this application is shown;

[0021] Figure 5 A left view of the non-methane total hydrocarbon detection device according to an embodiment of this application is shown;

[0022] Figure 6 A right view of the non-methane total hydrocarbon detection device according to an embodiment of this application is shown;

[0023] Figure 7 A schematic diagram of the gas path of the non-methane total hydrocarbon detection device according to an embodiment of this application is shown.

[0024] In the diagram: 100, Non-methane total hydrocarbon detection device;

[0025] 101. Gas chromatograph; 102. Hydrogen-air integrated unit; 103. Pretreatment system; 104. Mounting lugs; 105. Touch screen terminal; 106. Connecting pipes; 107. Handling clearance; 108. Throttling valve;

[0026] 1011. Electrical Room; 1011-1. Power Supply Module; 1011-2. Signal Conditioning Module; 1011-3. Control Module; 1011-4. Explosion-proof Positive Pressure Control System; 1011-5. Electrical Room Door Cover; 1012. Gas Supply Room; 1012-1. Gas Supply Room Door Cover; 1013. Electronic Pressure and Flow Control Room; 1013-1. Solenoid Valve; 1013-2. Electronic Pressure and Flow Control Module; 1013-3. 1014. Electronic pressure and flow control chamber cover; 1014. Temperature control chamber; 1014-1. Heating module; 1014-2. Sample injection device; 1014-3. FID detection module; 1014-4. Temperature control chamber cover; 1016. Observation window; 1031. Pretreatment system cover; 1032. Gas interface; 1033. Pressure regulating valve; 1034. Pressure gauge; 1035. Jet pump; 1036. Flow meter; 1037. Filter. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0030] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0031] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 3 As shown, in some embodiments, this application provides a non-methane total hydrocarbon detection device 100, comprising: a first installation chamber in which a gas chromatograph 101 is disposed, the gas chromatograph 101 being used for qualitative and quantitative analysis of a multi-component mixture; a second installation chamber in which a hydrogen-air integrated unit 102 is disposed, the hydrogen-air integrated unit 102 being connected to the gas chromatograph 101 via a pipeline and providing hydrogen and air to the detector in the gas chromatograph 101; and a third installation chamber in which a pretreatment system 103 is disposed, the pretreatment system 103 being connected to the gas chromatograph 101 via a connecting pipe 106 and providing driving gas and positive pressure gas source to the gas chromatograph 101.

[0033] The non-methane total hydrocarbon detection device 100 provided in this application is a highly integrated waste gas monitoring device. It has three installation chambers, and key components such as the gas chromatograph 101, the pretreatment system 103, and the hydrogen-air integrated unit 102 are placed in different chambers. The chambers are connected by pipelines to achieve collaborative operation, which not only ensures the independent operation and safety protection of each component, but also greatly improves the overall stability and reliability of the device, while facilitating the maintenance and replacement of different components.

[0034] Specifically, the gas chromatograph 101 is located in the first installation chamber. As the core analytical component, it is responsible for the qualitative and quantitative analysis of multi-component mixtures. Qualitative analysis refers to separating the components of the mixture and determining their types, while quantitative analysis refers to measuring the content of each component. The hydrogen-air integrated unit 102 is located in the second installation chamber and is connected to the gas chromatograph 101 in the first installation chamber via piping, providing hydrogen and air to the flame ionization detector in the gas chromatograph. The pretreatment system 103 is located in the third installation chamber and is connected to the gas chromatograph 101 in the first installation chamber via piping, providing the gas chromatograph 101 with driving gas, a positive pressure gas source, and the gas to be analyzed.

[0035] This application's solution integrates the three major functional modules—gas chromatograph 101, hydrogen-air integrated unit 102, and pretreatment system 103—into separate installation chambers. This not only improves integration but also effectively eliminates redundant pipelines and external interfaces common in split-type equipment, thus simplifying the overall structure. The gas chromatograph 101 is housed in an independent enclosure, eliminating the need for an external explosion-proof enclosure and directly meeting the explosion-proof requirements of explosive environments such as petrochemical plants. The hydrogen-air integrated unit 102 is installed in the second installation chamber, replacing the traditional external gas cylinder source and avoiding the risks associated with leaks from external hydrogen or air pipelines. Furthermore, its placement within an explosion-proof enclosure provides a certain level of explosion protection. The pretreatment system 103, located in the third installation chamber, provides a stable driving gas and positive pressure gas source for the gas chromatograph 101, ensuring stable gas flow and pressure, thereby guaranteeing the stable operation of the gas chromatograph 101 and the accuracy of the analytical results. This modular design not only improves the safety and reliability of the device but also facilitates maintenance and management, extending the device's service life.

[0036] like Figures 1-3As shown, in a specific implementation, the first installation chamber includes, from top to bottom, the following: an electrical chamber 1011, which houses a power module 1011-1, a signal conditioning module 1011-2, and a control module 1011-3; a gas path chamber 1012, which centralizes the various pipelines; and an electronic pressure and flow control chamber 1013 and a temperature control chamber 1014, arranged side-by-side below the gas path chamber 1012. The electronic pressure and flow control chamber 1013 houses a solenoid valve 1013-1 and an electronic pressure and flow control module 1013-2. The temperature control chamber 1014 houses a heating module 1014-1, a sample introduction device 1014-2, a filter 1037, and a flame ionization (FID) detection module 1014-3. The electrical chamber 1011 also houses an explosion-proof positive pressure control system 1011-4 and a data acquisition and analysis module.

[0037] In this application, the first installation chamber adopts a functional zoning layout, which is divided from top to bottom into an electrical room 1011, a pneumatic circuit room 1012, and an electronic pressure and flow control room 1013 and a temperature control room 1014 arranged side by side below the pneumatic circuit room 1012. This design makes the functions of each part clear, facilitates maintenance and management, and also helps to improve the stability and safety of the entire device.

[0038] The electrical room 1011 houses a power supply module 1011-1, a signal conditioning module 1011-2, a control module 1011-3, an explosion-proof positive pressure control system 1011-4, and a data acquisition and analysis module. Specifically, the power supply module 1011-1 provides power to all electrical components in the gas chromatograph except for the explosion-proof positive pressure control system 1011-4, ensuring their normal operation. The signal conditioning module 1011-2 is mainly used to adjust and optimize the signals generated by the gas chromatograph 101 and other equipment. When the signal output by the gas chromatograph 101 is interfered with or unstable during detection, this module can amplify and filter the signal to improve its quality and accuracy, thereby ensuring the reliability of subsequent data acquisition and analysis.

[0039] The control module 1011-3 is responsible for coordinating and controlling the operation of various functional modules. Based on preset programs and parameters, it precisely controls the analysis process of the gas chromatograph 101, the gas supply of the hydrogen-air integrated unit 102, and the gas processing of the pretreatment system 103. The explosion-proof positive pressure control system 1011-4 maintains the pressure in the electrical chamber 1011, the electronic pressure-flow control chamber 1013, and the temperature control chamber 1014 at a positive pressure state, preventing external explosive gas mixtures from entering the electrical chamber 1011, thereby reducing the risk of explosion and ensuring the safe operation of the device in hazardous environments. Specifically, this application provides two explosion-proof positive pressure control systems 1011-4. One system maintains the pressure in the interconnected electrical chamber 1011 and electronic pressure-flow control chamber 1013 at a positive pressure state, forming a positive pressure chamber. The other system maintains the pressure in the temperature control chamber 1014 at a positive pressure state, making it an independent positive pressure chamber. The two systems maintain the positive pressure environment of their respective chambers.

[0040] The data acquisition and analysis module is responsible for collecting various data output from equipment such as the gas chromatograph 101, including parameters such as detection signals, gas flow rate, and pressure. Then, specialized algorithms are used to analyze and process this data in real time to achieve qualitative and quantitative analysis of non-methane total hydrocarbons, providing decision-making support for environmental monitoring and industrial production process control.

[0041] The gas transmission chamber 1012 serves as the gas transmission hub of the entire detection device, and its main function is to centralize and manage various gas pipelines from the integrated hydrogen-air unit 102, the pretreatment system 103, etc. In this application, through reasonable pipeline layout and connection, it is ensured that the gas can be accurately and stably delivered to the detector, chromatographic column, and other parts of the gas chromatograph 101.

[0042] like Figure 3 and Figure 5 As shown, the electronic pressure and flow control chamber 1013 is equipped with a solenoid valve 1013-1 and an electronic pressure and flow control module 1013-2 for precise control of gas pressure and flow. Since different stages of gas chromatography analysis have different requirements for gas pressure and flow, the electronic pressure and flow control module 1013-1 can monitor and adjust the gas pressure and flow in real time according to preset programs and parameters, ensuring that they are always in optimal condition, thereby improving the analytical accuracy and repeatability of the gas chromatograph 101. The solenoid valve 1013-1 is used to achieve rapid on / off control of the gas, working in conjunction with the electronic pressure and flow control module 1013-2 to achieve precise gas regulation.

[0043] like Figure 2 and Figure 4As shown, the temperature control chamber 1014 is equipped with a heating module 1014-1, an injection device 1014-2, a filter 1037, and a flame ionization (FID) detection module 1014-3. Specifically, the heating module 1014-1 maintains a stable temperature within the temperature control chamber 1014, preventing temperature changes from altering the physicochemical properties of the gas and thus affecting the separation efficiency of the chromatographic column and the response of the detector. The injection device 1014-2 accurately introduces the pretreated gas sample into the chromatographic column of the gas chromatograph 101. The filter 1037 removes impurities and particulate matter from the gas sample, preventing these impurities from contaminating and damaging the chromatographic column and detector, thus extending the equipment's lifespan. The flame ionization (FID) detection module 1014-3 is a highly sensitive detector that uses a mixed flame of hydrogen and air to ionize organic compounds, generating a weak electrical signal. By measuring the intensity of this signal, quantitative analysis of the organic compound content is achieved.

[0044] The various parts of the first installation chamber in this application work together closely to provide a strong guarantee for the stable operation and accurate detection of the gas chromatograph 101, while also meeting the requirements for safe and reliable operation in special environments.

[0045] In one specific implementation, the temperature control chamber 1014 is also equipped with a multi-way valve, a chromatographic column, and a quantitative loop.

[0046] The temperature control chamber 1014 in this scheme is also equipped with a multi-port valve, a chromatographic column, and a quantitative loop. Specifically, the multi-port valve is a key component that can change the direction of gas flow. During the sample injection process, it can quickly and accurately switch the externally supplied gas sample into the chromatographic column, realizing the introduction of the sample and the switching of the carrier gas, ensuring the accuracy and repeatability of the analysis.

[0047] The chromatographic column is the core component of the gas chromatograph 101, used to separate different components in a mixture. In the detection of non-methane total hydrocarbons, it can separate the components in a complex gas mixture according to differences in physicochemical properties such as boiling point and polarity, so that each component has a different retention time when passing through the chromatographic column, thereby achieving qualitative and quantitative analysis of each component in the mixture.

[0048] The quantitative loop is used to precisely control the volume of sample entering the chromatographic column, ensuring that the volume of each injection is consistent, thereby achieving accurate quantitative analysis.

[0049] The scheme of this application enables the gas chromatograph 101 to efficiently and accurately separate and quantify non-methane total hydrocarbons by setting a multi-port valve, chromatographic column and quantitative loop in the temperature control chamber 1014, thus providing reliable detection performance and accurate analytical results for the entire detection device.

[0050] like Figure 3As shown, in a specific implementation, the door cover of the electrical room 1011 is equipped with a touch display terminal 105, and the door cover of the gas circuit room 1012 is equipped with a pressure regulating valve 1033 and a pressure gauge 1034.

[0051] In this solution, the touch display terminal 105 on the electrical room door cover 1011-5 not only displays the real-time operating status information and test data of the testing device, allowing operators to promptly understand the test results and device operation, but also issues alarms when abnormal conditions occur. Furthermore, operators can intuitively perform various operation settings on the entire testing device through the touch display terminal 105, achieving centralized control of the entire testing device, greatly facilitating the operation process and improving work efficiency.

[0052] The gas passage chamber 1012 contains a gas passage module, and the gas passage chamber cover 1012-1 is equipped with a pressure regulating valve 1033 and a pressure gauge 1034. The pressure regulating valve 1033 is mainly used for fine adjustment of the gas pressure entering the gas passage chamber 1012. In use, the operator can change the valve opening by rotating the handwheel or adjusting knob of the pressure regulating valve 1033 according to actual needs and equipment requirements, thereby adjusting the gas pressure by raising or lowering it. The pressure gauge 1034 is used to monitor the gas pressure at the inlet of the gas passage chamber 1012 in real time and displays the pressure value in a visually intuitive numerical form on the dial, allowing the operator to know at any time whether the current gas pressure is within the normal operating range.

[0053] The solution proposed in this application further optimizes the ease of operation, monitoring capability, and safety of the testing device by setting a touch display terminal 105 on the electrical compartment door cover 1011-5 and a pressure regulating valve 1033 and a pressure gauge 1034 on the gas circuit compartment door cover 1012-1. This enables operators to operate and manage the device more intuitively and efficiently, ensuring the smooth progress of the testing work.

[0054] In one specific implementation, the hydrogen / air integrated unit 102 includes a hydrogen / air generating unit that is connected to the detector via a pipeline and supplies it with hydrogen and air.

[0055] The hydrogen / air integrated unit 102 in this solution is equipped with a hydrogen / air generating unit. The hydrogen / air generating unit is connected to the FID detection module 1014-3 through a pipeline, thereby providing a stable supply of the required gas to the FID detection module 1014-3, ensuring that the detector can work efficiently and stably, thereby improving the accuracy and sensitivity of the detection.

[0056] like Figure 3 and Figure 4As shown, the hydrogen-air integrated machine 102 in this solution is equipped with a pressure regulating valve 1033, a pressure gauge 1034 and a throttle valve 108, and an observation window 1016 is provided on the door cover of the hydrogen-air integrated machine 102, which facilitates the user to observe the instrument data.

[0057] In one specific implementation plan, the enclosure forming the second installation chamber is an explosion-proof enclosure that meets explosion-proof rating certification.

[0058] In the scheme of this application, the enclosure forming the second installation chamber adopts an explosion-proof enclosure design that meets the explosion-proof level certification, thereby enabling the second installation chamber to provide a safe and reliable operating environment for the hydrogen-air integrated machine 102, reducing the risk of accidents in explosive locations, and ensuring the safe and stable operation of the entire non-methane total hydrocarbon detection device 100 in complex and dangerous environments.

[0059] like Figure 3 and Figure 4 As shown, in one specific embodiment, the pretreatment system 103 includes a filter 1037, a pressure regulating valve 1033, a pressure gauge 1034, a flow meter 1036, and a jet pump 1035.

[0060] The pretreatment system 103 in this solution includes a filter 1037, a pressure regulating valve 1033, a pressure gauge 1034, a flow meter 1036, and a jet pump 1035. Specifically, the filter 1037 removes impurities and particulate matter from the gas, preventing these impurities from entering the gas path system of the gas chromatograph 101, thus avoiding clogging of pipelines, contamination of detectors, and affecting the accuracy of analytical results. The pressure regulating valve 1033 regulates the gas pressure entering the pretreatment system 103, ensuring a stable pressure during subsequent transmission and analysis. The pressure gauge 1034 monitors the gas pressure in the pretreatment system 103 in real time, ensuring the gas pressure remains within the normal operating range. The flow meter 1036 measures the gas flow rate in the pretreatment system 103, ensuring the gas enters the gas chromatograph 101 at a suitable flow rate, thereby guaranteeing the accuracy and repeatability of analytical results. The jet pump 1035 utilizes the ejection effect of a high-speed fluid to create a vacuum, thereby achieving gas extraction and delivery. In other words, in the detection of non-methane total hydrocarbons, the jet pump 1035 can be used as a driving gas source to provide power for the transmission of gas samples.

[0061] like Figure 6 As shown, the pretreatment system cover 1031 in this application is provided with an observation window 1016, and the pretreatment system 103 is also provided with an air passage interface 1032.

[0062] The pretreatment system 103 in this solution only includes a mechanical pressure regulating valve 1033, a jet pump 1035, and a scale instrument. It has no electrical components and does not require explosion-proof design, thus reducing costs while ensuring overall explosion-proof compliance.

[0063] like Figure 7 As shown, in a specific implementation, the compressed air inlet of the pretreatment system 103 is divided into five paths by the filter 1037. The first and second paths are connected to the jet pump 1035 via the pressure regulating valve 1033 to form a sampling air path; the third path is connected to the flow meter 1036 to form a purging air path; the fourth path is connected to the pressure regulating valve 1033 to form a driving air path; and the fifth path forms a positive pressure air source air path.

[0064] The pretreatment system 103 in this scheme is an important component of the entire non-methane total hydrocarbon detection device 100. Its main function is to filter, stabilize, and regulate the flow rate of the gas entering the detection system to ensure the accuracy and reliability of the detection results. This system includes a main inlet and five independent gas paths, each with a specific function and purpose. The compressed air inlet of the pretreatment system is divided into five paths by a filter. The first and second paths are both treated by filters, then the pressure is regulated by a pressure regulating valve before being discharged from the pretreatment system by a jet pump. The sampled gas path then passes through a pressure gauge and flow meter connected to the jet pump, as well as a gas chromatograph. This mainly provides stable gas sample delivery power to the detection device, ensuring that the gas sample can be smoothly transferred from the sampling point to the detector.

[0065] The third path, filtered by a filter, enters the flow meter and finally the gas chromatograph, forming a purge gas path. This purge gas path cleans the pipelines and components, preventing impurities from accumulating and affecting the detection results. The fourth path, filtered by a filter, enters the pressure regulating valve and the gas chromatograph to form the driving gas. Its main function is to provide stable gas power for the gas chromatograph and other gas-driven components. The fifth path is a positive pressure gas source path connecting the pressure gauge, flow meter, and gas chromatograph. The pressure gauge displays the pressure of the positive pressure gas source, helping operators monitor the gas path pressure. The function of the fifth path is to provide a positive pressure gas environment for the entire detection device, preventing external contaminant gases from entering and ensuring the cleanliness and safety of the detection system.

[0066] It is worth noting that this solution also includes a standard gas path and hydrogen / air paths. Specifically, the standard gas path refers to the standard gas entering the pretreatment system, passing through a flow meter, and then entering the gas chromatograph. The flow meter is used to detect and read the gas flow rate. The hydrogen / air path refers to the process where hydrogen and air are generated by a hydrogen-air integrated unit and delivered to the gas chromatograph through pipelines, serving as combustion gases for the FID detection module to detect the sample gas.

[0067] In one specific implementation, the bottom of both the box forming the first installation chamber and the box forming the second installation chamber are provided with transport gaps 107, and the side walls of the boxes are provided with mounting ears 104.

[0068] In this design, the bottom of the enclosures forming the first and second installation chambers are provided with transport gaps 107. These transport gaps 107 are designed primarily for ease of handling and installation. During transportation and on-site installation, personnel can easily insert handling tools (such as forklifts, trolleys, etc.) to ensure smooth transport, reducing the difficulty and risk of manual handling and improving efficiency. Simultaneously, the transport gaps 107 also facilitate ventilation and heat dissipation at the bottom of the equipment, ensuring smooth airflow during operation, which helps reduce operating temperature and improves stability and lifespan. Furthermore, all three installation chambers in this application are equipped with mounting ears 104, facilitating hoisting and securing of the enclosures.

[0069] The design of the handling clearance 107 and the mounting ear 104 in this application fully considers the needs of handling, installation, fixing and safety of the equipment in actual use, and provides a strong guarantee for the stable operation and long-term use of the equipment.

[0070] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A non-methane hydrocarbon detection device, characterized by, include: The first installation chamber is equipped with a gas chromatograph, which is used for qualitative and quantitative analysis of multi-component mixtures. The second installation chamber is equipped with a hydrogen-air integrated unit, which is connected to the gas chromatograph via a connecting pipe and provides hydrogen and air to the detector in the gas chromatograph. as well as The third installation chamber contains a pretreatment system, which is connected to the gas chromatograph via a connecting pipe and provides the gas chromatograph with driving gas and positive pressure gas.

2. The detection device of claim 1, wherein, The first installation chamber includes, from top to bottom, the following: The electrical room contains power supply modules, signal conditioning modules, and control modules; The gas passage chamber is used to centralize the various pipelines; and An electronic pressure and flow control chamber and a temperature control chamber are arranged side by side below the gas path chamber. The electronic pressure and flow control chamber is equipped with an electronic pressure and flow control module and a solenoid valve. The temperature control chamber is equipped with a heating module, a sample injection device, a filter, and a hydrogen flame ionization (FID) detection module.

3. The detection device of claim 2, wherein, The electrical room is also equipped with an explosion-proof positive pressure control system and a data acquisition and analysis module.

4. The detection device of claim 2, wherein, The door cover of the electrical room is equipped with a touch display terminal, and the door cover of the gas circuit room is equipped with a pressure regulating valve and a pressure gauge.

5. The detection device of claim 2, wherein, The temperature control chamber is also equipped with a multi-way valve, a chromatographic column, and a quantitative loop.

6. The detection device according to claim 1, characterized in that, The hydrogen-air integrated machine includes a hydrogen / air generating unit, which is connected to the detector via pipeline and provides it with hydrogen and air.

7. The detection device according to claim 6, characterized in that, The enclosure that forms the second installation chamber is an explosion-proof enclosure that meets explosion-proof certification standards.

8. The detection device according to claim 1, characterized in that, The pretreatment system includes a filter, a pressure regulating valve, a pressure gauge, a flow meter, and a jet pump.

9. The detection device according to any one of claims 1-8, characterized in that, The compressed air inlet of the pretreatment system is divided into five paths by a filter, of which the first and second paths are connected to a jet pump via a pressure regulating valve to form a sampling air path. The third path forms the purging air path via a flow meter; The fourth path forms the driving air path via the pressure regulating valve; The fifth path forms a positive pressure gas source path.

10. The detection device according to any one of claims 1-8, characterized in that, Both the box forming the first installation chamber and the box forming the second installation chamber have transport gaps at their bottoms, and the side walls of the boxes are provided with mounting ears.

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